https://devzone.nordicsemi.com/f/nordic-q-a/109066/design-nrf52840-based-board-with-3-3v-power-supply-vout-1-8v-and-usb-capabilityHello everyone . I am desiging a PCB baseon nrf52840. My use case should have the below features: 1) Get power suppbly from a LiPo battery ( for that I am thinking to power the nrf chip from a regulator with stable 3.3V otput) 2) Has the USB feautureen-USTelligent Community 13Mon, 11 Mar 2024 11:07:14 GMThttps://devzone.nordicsemi.com/thread/473146?ContentTypeID=1Mon, 11 Mar 2024 11:07:14 GMT137ad170-7792-4731-bb38-c0d22fbe4515:216f3d4f-1f2c-42be-816e-489f894bebd1nik_mitros<p>yeah thats true. thank you for that!</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/473001?ContentTypeID=1Fri, 08 Mar 2024 15:30:27 GMT137ad170-7792-4731-bb38-c0d22fbe4515:751b7342-6e1d-45e4-b6aa-3714478c9246Turbo J<p>The SPI/SD data lines run with 3.3V levels. You would need a level shifter when running on 1V8 VDD.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/473000?ContentTypeID=1Fri, 08 Mar 2024 15:26:29 GMT137ad170-7792-4731-bb38-c0d22fbe4515:5818c7b9-7348-4d36-9a69-50487dba9d76nik_mitros<p>Yeah thats what I will do . I will power the SD card from the 3.3V regulator. I just then need to read the filesystem of the card via the USB</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/472984?ContentTypeID=1Fri, 08 Mar 2024 14:36:17 GMT137ad170-7792-4731-bb38-c0d22fbe4515:8a2b2b19-fbc0-4196-9f27-94cd58211fb3Turbo J<p>SD cards runs on a 3.3V rail for both VCC and data - I&#39;d use a design that uses 3.3V VCC.</p><div style="clear:both;"></div>